Preferred order for tables of contents?

[MT2008]

I didn't really think there was much of an established order, though almost everyone seems to put handguns first. After that, it's usually anything goes, though it's pretty common to put either "shotguns" or "submachine guns" second, then "assault rifles", "sniper rifles", and others (i.e. "heavy weapons"). I never thought of it in terms of the physical size of the weapons in question. But seriously, it's pretty ad-hoc. I guess we should agree on a standard.